A systematic procedure is proposed for the design of a pressure-swing distillation (PSD) process ternary mixture. This involves thermodynamic insight, global optimization, and heat integration. The aim insight to analyze feasibility find all possible separation sequences via residue curve maps boundaries. optimization total 16 variables in three columns conducted by multiobjective genetic algorithm (MOGA) with economy environmental impact as objectives. In integration, four-step integration...

Degradation of crop straw in natural environment has been a bottleneck. There recent increase the exploration cold-adapted microorganisms as they can solve problem corn degradation under low temperatures and offer new alternatives for sustainable development agriculture. The study was conducted low-temperature (10°C) high-efficiency cellulose-degrading bacteria were screened using carboxymethyl cellulose (CMC) selection medium subjected to genome sequencing by third-generation Pacbio Sequl...

The binding behavior of 3-methylcyclopentane-1,2-dione, a cyclic α-diketone with caramel-like aroma, was investigated to elucidate molecular mechanisms olfactory recognition. Using Fourier-transform microwave spectroscopy complemented quantum chemical calculations, the structures 3-methylcyclopentane-1,2-dione and its monohydrate were determined, revealing preferred conformation monomer structural changes upon complexation water. Intramolecular hydrogen bond weakening observed, indicating...

The grounding device plays performs the role of releasing a lightning current and fault in power system, corrosion conductor will cause damage to body, which threatens safe operation system. grid detection technology equipment guarantee This paper discusses research status topological detail introduces basic principles, difficulties existing problems methods such as electric network method, electromagnetic field electrochemical ultrasonic method imaging method. time difference positioning...

A wavelet edge detection method is introduced to image the topology of grounding grids and locate conductors from measured magnetic induction. Theoretical analysis field calculation discrete transform are described. Since sharpest variation perpendicular ground surface occurs right above a conductor, gradient vector modulus maximum vertical component can be calculated extract position information about conductor. This scheme derived Canny detection. 2-D à trous algorithm used perform...

The grounding grid is critical to the safety and stability of a power system. Corrosive cracking conductor main cause deterioration performance. Existing fault diagnosis methods for grids are limited by number distribution leads, some them cannot be used online detection. This paper proposes detection method based on magnetic source excitation. measuring device consists four coils, two horizontal excitation vertical receiving coils. secondary field signal extracted from primary background...

The rotational spectrum of the 1 : benzaldehyde-CO2 complex has been investigated using pulsed-jet Fourier transform microwave spectroscopy complemented with quantum chemical calculations. Two isomers, both characterized by one C⋯O tetrel bond (n → π* interaction) and C-H⋯O hydrogen σ* interaction), have observed in pulsed jet. Competition between disclosed natural orbital analysis: isomer I is dominating OCCO2⋯O (12.6 kJ mol-1) a secondary (C-H)formyl⋯O (2.2 mol-1); contrast, II...

Abstract The purpose of this study is to investigate the mechanism solid‐state polymorphic transition p ‐aminobenzoic acid (PABA) using in situ Raman spectroscopy measurement. experiments were conducted on a micro quartz vessel mounted microscope, hot and cold stage, under isothermal conditions. temperature was precisely controlled by standalone controller equipped with liquid nitrogen cooling system. probe positioned surface solid sample vessel. progression monitored recorded spectroscopy....

The rotational spectra of maleic anhydride-(H2O)1-3 have been investigated for the first time by using pulsed jet Fourier transform microwave spectroscopy with complementary computational analyses. experimental evidence points out that water tends to self-aggregate hydrogen bonds and form homodromic cycles. Differences in bond lengths charge distribution between two carbonyl sites observed upon stepwise hydrations, which might further introduce a selectivity on nucleophilic attack...

Phenyl isocyanide has been chosen as a prototype to probe the π-π interaction modulated by -NC group, which chameleonic nature with two main resonance forms showing triple bond and being carbenoid. The rotational spectroscopic investigation complemented theoretical analyses indicates that phenyl dimer scissor-like configuration controlled dispersive forces along formation of stacking. This is first evidence, best our knowledge, mono-substitution an group on benzene can activate meta position...

Abstract This study delves into driving forces behind the formation of a hetero ternary cluster consisting volatile organic compounds from industrial or combustion sources, specifically cyclopentene, alongside greenhouse gases like carbon dioxide, and water vapor. While substantial progress has been made in understanding binary complexes, structural intricacies clusters remain largely uncharted. Our research characterized cyclopentene−CO 2 −H O utilizing Fourier transform microwave...

This paper investigates a two-dimensional nonautonomous nonlocal Swift–Hohenberg equation with two kinds of kernels and studies the existence invariant measures statistical solutions, which are important research objects in area turbulence for fluid systems. The weak solutions guarantees norm-to-weak continuous process associated equation. We first prove pullback attractor via flattening. Then unique is obtained by appropriate construction, so that measure supported this attractor. turned...

When studying the influence of nonlinear seepage on water flooding development ultra-low permeability reservoirs, it is difficult to accurately characterize state reservoirs using conventional reservoir numerical simulation methods. A large number field and tests in oil fields show that there are indeed starting pressure gradients stress sensitivity effects sandstone reservoirs. In this study, taking tight Chang 6 Member Yanchang Formation as an example, rock displacement vector was utilized...

A combined experimental and computational approach is applied to amorphous polycarbonates (PCs) link the macroscopic behavior molecular features. The Simha–Somcynsky equation of phase (EOS) provides a more accurate description than Tait EOS for describing pressure–volume–temperature (PVT) relationship thermal expansivity. between specific volume hole free was investigated using PVT measurements, positron annihilation lifetime spectra, dynamics (MD) techniques, examine correlations changes in...

Rotational spectra of the 2-ethynylpyridine monomer and its monohydrate have been characterized by pulsed jet Fourier transform microwave spectroscopy complemented with quantum chemical calculations. The measurements rotational transitions eight monosubstituted isotopologues (15N 13C) in natural abundances allow an accurate structural description skeleton 2-ethynylpyridine. For monohydrate, only most stable isomer, stabilized O-H···N a secondary C-H···O hydrogen bonds, has observed...

This paper focuses on the following modified quasilinear fourth-order elliptic equation: $$\textstyle\begin{cases} \triangle^{2}u-(a+b\int_{\mathbb{R}^{3}} \vert \nabla u ^{2}\,dx)\triangle u+\lambda V(x)u-\frac{1}{2}\triangle(u^{2})u=f(x,u),& \mbox{in }\mathbb{R}^{3}, \\ u(x)\in H^{2}(\mathbb{R}^{3}), \end{cases} $$ where $\triangle^{2}=\triangle(\triangle)$ is biharmonic operator, $a>0$ , $b\geq 0$ $\lambda\geq 1$ a parameter, $V\in C(\mathbb{R}^{3},\mathbb{R})$ $f(x,u)\in...